According to the conclusionsof this study, the functionsof the human brainarebetween50,000 and 500,000years ago,evolvedrapidly.During this period,ourdistantancestorwas availableonly hisbrainsand armedhimhe hadto hunt forfood,buildhomes andprotectthemselves and theiroffspring.

Crabtreebelieves that people areits intellectualpeakreachedbefore2,000 to6,000 years,which meansthat they had"a good memory, a widerangeof newideas anda veryclear idea of​​whatare the most importantissuesof his time."

The Stanfordresearchersfoundthat theadvances in technologyand medicinemasquerading"downwardtrend of ourintellect"andthat he willcontinue in the future.